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National Stock Number:
1240-01-171-8373
Federal Supply Class:
1240
National Item Identification Number:
011718373
Description:
WINDOW,OPTICAL INSTRUMENT
Detail:
A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.
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Manufacturer Information:
| 13084358 | 04939 | LOCKHEED MARTIN CORPORATION | | 13084358 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH | | 13084609 | 22669 | COHERENT AEROSPACE & DEFENSE, INC. | | 1354000 | 54287 | ALPHA OPTICAL SYSTEMS INC | | 13084609 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH | | 13084609 | 81996 | U S ARMY AVIATION AND MISSILE COMMAND | | 1446000 | 54287 | ALPHA OPTICAL SYSTEMS INC |
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Techincal Specification:
| DISPERSION | 67.3 ANGSTROMS MINIMUM AND 68.3 ANGSTROMS MAXIMUM | | LENGTH | 11.275 INCHES MINIMUM AND 11.285 INCHES MAXIMUM | | MATERIAL | GLASS SILICA LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | POLISHED SURFACE | BOTH | | REFRACTION INDEX | 1.4570 MINIMUM AND 1.4590 MAXIMUM | | SURFACE FINISH | POLISHED | | THICKNESS | 0.970 INCHES MINIMUM AND 1.007 INCHES MAXIMUM | | WIDTH | 5.455 INCHES MINIMUM AND 5.505 INCHES MAXIMUM |
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